Differential photosynthetic plasticity of Amazonian tree species in response to light environments.

Autor: Nina Junior ADR; Laboratory of Ecophysiology and Forest Production, Federal Institute of Education, Science, and Technology of Amazonas (IFAM) - Campus Humaitá, Humaita, Amazonas, Brazil.; National Institute of Science and Technology on Plant Physiology Under Stress Conditions (INCT-CNPq-Brazil), Viçosa, Minas Gerais, Brazil., Maia JMF; University of State of Amazonas (UEA), Manaus, Amazonas, Brazil., Martins SVC; National Institute of Science and Technology on Plant Physiology Under Stress Conditions (INCT-CNPq-Brazil), Viçosa, Minas Gerais, Brazil.; Department of Plant Biology, Federal University of Viçosa (UFV), Viçosa, Minas Gerais, Brazil., Dos Santos Nina NV; Laboratory of Ecophysiology and Forest Production, Federal Institute of Education, Science, and Technology of Amazonas (IFAM) - Campus Humaitá, Humaita, Amazonas, Brazil., da Costa KCP; Faculty of Agronomy, Institute of Studies in Agrarian and Regional Development - IEDAR, Federal University of South and Southeast of Pará (UNIFESSPA), Maraba, Pará, Brazil., de Carvalho JC; National Institute of Science and Technology on Plant Physiology Under Stress Conditions (INCT-CNPq-Brazil), Viçosa, Minas Gerais, Brazil.; Laboratory of Plant Physiology and Biochemistry, National Institute for Amazonian Research (INPA), Manaus, Amazonas, Brazil., Schramm Mielke M; Department of Biological Sciences/DCB, State University of Santa Cruz (UESC), Ilhéus, Bahia, Brazil., Nunes-Nesi A; National Institute of Science and Technology on Plant Physiology Under Stress Conditions (INCT-CNPq-Brazil), Viçosa, Minas Gerais, Brazil.; Department of Plant Biology, Federal University of Viçosa (UFV), Viçosa, Minas Gerais, Brazil., Araújo WL; National Institute of Science and Technology on Plant Physiology Under Stress Conditions (INCT-CNPq-Brazil), Viçosa, Minas Gerais, Brazil.; Department of Plant Biology, Federal University of Viçosa (UFV), Viçosa, Minas Gerais, Brazil., de Carvalho Gonçalves JF; National Institute of Science and Technology on Plant Physiology Under Stress Conditions (INCT-CNPq-Brazil), Viçosa, Minas Gerais, Brazil.; Laboratory of Plant Physiology and Biochemistry, National Institute for Amazonian Research (INPA), Manaus, Amazonas, Brazil.
Jazyk: angličtina
Zdroj: Plant biology (Stuttgart, Germany) [Plant Biol (Stuttg)] 2024 Jun; Vol. 26 (4), pp. 647-661. Date of Electronic Publication: 2024 Mar 15.
DOI: 10.1111/plb.13632
Abstrakt: To investigate how and to what extent there are differences in the photosynthetic plasticity of trees in response to different light environments, six species from three successional groups (late successional, mid-successional, and pioneers) were exposed to three different light environments [deep shade - DS (5% full sunlight - FS), moderate shade - MS (35% FS) and full sunlight - FS]. Maximum net photosynthesis (A max ), leaf N partitioning, stomatal, mesophile, and biochemical limitations (SL, ML, and BL, respectively), carboxylation velocity (V cmax ), and electron transport (J max ) rates, and the state of photosynthetic induction (IS) were evaluated. Higher values of A max , V cmax , and J max in FS were observed for pioneer species, which invested the largest amount of leaf N in Rubisco. The lower IS for pioneer species reveals its reduced ability to take advantage of sunflecks. In general, the main photosynthetic limitations are diffusive, with SL and ML having equal importance under FS, and ML decreasing along with irradiance. The leaf traits, which are more determinant of the photosynthetic process, respond independently in relation to the successional group, especially with low light availability. An effective partitioning of leaf N between photosynthetic and structural components played a crucial role in the acclimation process and determined the increase or decrease of photosynthesis in response to the light conditions.
(© 2024 Wiley‐VCH GmbH. Published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz: